title: Spectrophotometric studies on mixtures of purified diphtherial toxin and ferriprotoporphyrin IX.
mesh_terms: D004165:Diphtheria; D004167:Diphtheria Toxin; D006427:Hemin; D011166:Porphyrins; D013053:Spectrophotometry
chemical_list: D004167:Diphtheria Toxin; D011166:Porphyrins; D006427:Hemin
keywords: DIPHTHERIA; PORPHYRIN